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读定txt文件的问题
Jun 23, 2016 pm 01:47 PM 一。请问怎么每次把内容写入txt文件的第一行。
二。请问怎么读取txt文件的最后一行。
回复讨论(解决方案)
一:
$handle = fopen ( 'a.txt' , 'r+' );rewind($handle);fwrite($handle,"这是第一行\r\n");fclose ( $handle );
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二:
$handle = fopen ( 'a.txt' , 'r+' );$arr=array();while($line=fgets($handle)){ $arr[]=$line;}fclose ( $handle );echo end($arr);
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一。那个写入txt第一行把txt文件原来的内容都清除了,我是想保留原来的内容,新内容插入到第一行。
$str="这是第一行\r\n"; $handle = fopen ( 'a.txt' , 'r+' ); while($line=fgets($handle)){ $str.=$line; } fclose($handle); file_put_contents('a.txt',$str);
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看来没有直接功能去实现,只能循环取出数据了,谢谢啦
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